I live in a rain forest. Every winter washes the soil clean of the majority of nitrogen that was built up the previous summer. To keep a raised bed alive I have to amend with bulk compost in the fall and spring. Without the fall amendment the soil starves and the spring amendment is less effective. That was until I added biochar(innoculated charcoal) to my beds. The charcoal prevents nutrients from being washed out of the soil when there are no plants replenishing it. In beds amended with biochar I get higher production and lower inputs. Biochar can help reduce inputs on chemical farms too. But, the combination of healthy living soil and biochar, for me, makes gardening easy. I am more concerned with whether a plant has enough sun than anything else these days.